Improvement in grain-drill teeth



G. L. IVE S.

D rill Teeth.

UNITED STATES PATENT OFFICE.

GEORGE L. IVES, OF GALESBURG, MIGHIGAN, ASSIGNOR TO HIMSELF AND HENRY L. KEITH, OF SAME PLACE.

IMPROVEMENT IN GRAlN-DRILL TEETH;

Specification forming part of Letters Patent No. 166,779, dated August 17, 1875; application filed June 12, 1875.

To all whom it may concem:

Be it known that I, GEORGE L. IVES, of Galesburg, in the county of Kalanazoo and V State of Michigan, lave invented a new and useful Improvenent in Grain-Drill Tooth, of which the following is a specification:

Figure 1 is a perspeetive view of my improved grain-drillv tooth. Fig.- 2 is a vertical longitudinal section of the same. Fig. 3 is a cross-seetion of the same, taken through the line' :v ar, Fg. 2. Fig. 4zis a cross-Section, taken through the line y y, Fig. 2. Fig. 5 is g detail section, taken through the line z z,

Similar. letters of reference indicate correspoding parts.

The invetion will first be described in connection with drawing, and then pointed out in clain.

A represeuts the point, B the body, and C the shank, of the tooth to be attached to an ordiary drill-tube. The sides of the tooth from the line l 2 are rounded oi` or inclined upward and forward and downward and forward. The lower `forward edge of the tooth between the points l 3 is slightly curved or made ruuner-shaped, as shown in Figs. 1 and 2, so that the tooth may pass easily through the ground, so that rubbish cannot collect under and around the point of the tooth to prevent the grain frorn being evenly deposited in the drill or trench opened by said tooth. The forward edge of the tooth between the points l 4 slightly inclines to the rearward, as shown in Figs. 1,2, and 3. From the point 4 the forward side inclines or is curved to the rearward and upward into the shank O. This construetion prevents any rubbish that may be upon the surface of the lground from lodging upon the tooth and clogging it. -In the rear edge of the tooth is formed a groove, D, the upper part of which, down to about the point d', is vertical. From the point d' the g'oove D curves or slopes to the rearward until it runs out a little above the point of the tooth, so as to conduct the seed into the trench opened by the tooth before said trench has been partially filled by the falling in of the soil. The rear edges of the toothfrom the points 5 to the point 2, are cut out upon a curve, as shown in Figs. 1 and 2, to allow the point to enter the ground to a greater depth without making the trench so wide that the grain will not be properly covered by the falling in of the soil. E is a wrought-iron rivet for attaohing the point to the drill-tube, the end of which is cast into but not through the shank of the tooth, and

which projects into the groove D, as shown in Fig. 2. This leaves the forward side of the sha-nk G of the tooth entirely smooth.

The teeth are cast of a composition metal formed of wrought-iron, cast-iron, and steel. This conposition gives a hard, smooth surface, and forns a strong and durable point.

Having thus described my invention, I olaim as new and desire to-.secure by Letters Patent- A tooth for grain-drill tubes, consist-ing of front Wedge shaped furrow opener A and shank C, the rear cavity D running through both, being straight to cross-line d', and passing out on a rearward curve near the bottom, as shown and described.

GEORGE L. IVES.

Witnesses:

JOHN T. IVEs, EDWIN P. FLANDERs. 

